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9th Class Mental Ability Related to Competitive Exam Question Bank Arithmetical Reasoning

  • question_answer
    Direction for questions: Circle A represents even numbers from 2 to 50. Circle B represents odd numbers from 2 to 50. Circle C, represents prime numbers from 2 to 50.
    How many elements are there in C? (complement)?

    A) 35                       

    B)         25

    C) 34    

    D)        14

    E) None of these

    Correct Answer: C

    Solution :

    Explanation Option [c] is correct. Number of elements in C = the elements which do not belong to the set C. There are (24 + 10) = 34 such numbers i.e., numbers are non-primes.                   


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